102105542 has 32 divisors (see below), whose sum is σ = 191752704. Its totient is φ = 39614400.

The previous prime is 102105529. The next prime is 102105547. The reversal of 102105542 is 245501201.

It is a super-2 number, since 2×102105542² = 20851083414227528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102105547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39242 + ... + 41762.

It is an arithmetic number, because the mean of its divisors is an integer number (5992272).

Almost surely, 2^102105542 is an apocalyptic number.

102105542 is a deficient number, since it is larger than the sum of its proper divisors (89647162).

102105542 is a wasteful number, since it uses less digits than its factorization.

102105542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 102105542 is about 10104.7286950219. The cubic root of 102105542 is about 467.3939698724.

Adding to 102105542 its reverse (245501201), we get a palindrome (347606743).

The spelling of 102105542 in words is "one hundred two million, one hundred five thousand, five hundred forty-two".